Ash-conveying mechanism



Feb. 1925- 1,525,048

E. w. ROBEY ASH CONVEYING MECHANI SM Filed Nov. 10. 1919 3 Sheets-Sheet1 Feb. 1925- 1,525,048

E BEY Feb. 3, 1925.

E. W. ROBEY ASH CONVEYING MECHANISM Filed Nov. 10. 1919 3 Sheets-Sheet:5

o 0 o fie n no Patented Feb. 3, 1925.

UNITED STATES 1,525,048 PATENT OFFICE.

ERNEST W. ROBEY, OF LONDON, ENGLAND, ASSIGNOR TO UNDERFEED STOKER COM-PANY LIMITED, OF LONDON, ENGLAND.

ASH-CONVEYING MECHANISM.

Application filed November 1"0 aZZ whom it may concern:

Be it known that I, ERNEST VViLLIAM Room, a subject of the King of GreatBritain, residing in London, England, have invented certain new anduseful Improvements in Ash-Conveying Mechanism, of which the followingis a. specification.

In operating furnaces of the kind n which the ashes are discharged intoa con- .veyor operating under water which acts as a seal to preventaccess of air to the furnace, there is the difficulty that should theconveyer be put out of work for any reason, provision mustbe made forco-ntlnuing the removal of ashes and itbeco-mes a problem how to do thiswithout admitting air to the furnace.

By the present invention the submerged conveyer is duplicated eachconveyor being separately operated and a device is provided with meansby which the ashes -can be diverted from the point of discharge so that.they fall into either coir-lever accordingly as the device is set fortheir travel in one direction or the other. Thus, should one conx'eyerbe thrown out of operation, the other can be brought into use by merelysetting the said device, and removal of ashes continues withoutdisturbing the water seal.

T hrce constructions are shown in the accompanying drawings as examplesof the invention.

F ig. 1 is a cross section through a trough containing water which sealsa discharge hopper, the trough containing .two conveyors.

Fig. 2 is a cross section through a trough containing water and twoconveyers, the trough being built in a furnace setting and serving anumber of travelling grates.

Fig. 3 is a diagrammatic longitudinal sec tion through one of theconveyers on line 3-3 of Fig. 2.

Fig. 4 is a cross section through two parallel troughs, each containingwater and a conveyer, and each trough serving a common discharge hopper.

Referring Fig. 1, the bottom of the trough a has tracks for twoconveyers b at a suitable distance apart. The co-nveyers here shown areof the endless chain type, travelling up inclines at the ends of thetrough and returning beneath the latter. The trough is adapted to holdwater of sufficient depth to seal the discharge hopper c, and is oflength suitable for serving sev- 10, 1919. Serial No. 337,082.

1 eral such hoppers. Co-incidently with the longitudinal middle line ofthe trough is mounted a shaft (Z adapted tobe turned on its axis by thelever e and carrying beneath each hoppcr a plate f of length suflicientto extend at an incline, from one edge of the rectangular mouth of thehopper to the opposite conve'yer as indicated in the drawing. Thus theplate guides the ashes and clinker. to the conveyor in use; when it isdesired to use the other conveyer the lever e is turned so that plate fmay have the position indicated in dotted lines.

' Referring to Fig. 2 the trough a serves a number of travelling gratesg. The trough is divided by a longitudinal partition h and eachcompartn'ient contains an endless chain conveyer b travelling in thetrough and submerged for the greater part of its length in the watertherein. As in the ease of Fig. 1 a longitudinal shaft (5', mounted tobe turned on its axis by a lever B carries a flap i at the place ofdischarge of each grate 9. When this flap has the position shown in fulllines the ashes are discharged into the left hand compartment of thetrough where they fall through the upper length of the eonveyer to becarried away by the lower length. When the flap is turned into theposition shown in dotted lines the right hand conveyor receives theashes. Between adjacent grates a vertical plate m extends below thesurface of the water in the trough to seal the discharge passage. I Theendless chains of the conveyor, one of which chains is seen at b in Fig.3 travel over front and rear sprocket wheels C and K respectively andare guided by pulleys Z and n. The front sprockets C are suitably drivenand the axle of the rear sprockets K is mounted in a lever frame 0adapted to be adjusted in position by screw spindle p for tcnsioning thechains.

Referring to Fig. 4 the hopper has two discharge chutes, one over eachtrough a As before the troughs serve a number of hoppers. The endlesschain conveyers 5 return below the troughs as in Fig. 1. On the drawingthe left hand chute is discharging the hopper, the door 70 controlled bya lever (not shown) being in open position, while the corresponding doorZ of the right hand chute is closed.

Having thus described the nature of the said invention and the bestmeans I know of carrying the same into practical efiect, I claim 1. Incombination, a furnace setting, a travelling grate therein, meansadapted to containwater, battles extending from said setting into thewaiter space thereof to seal the grate from access of air, two'parallelchain type conveyors in said Water space, and means adapted to directashes from said grate continuously into either conveyor.

2. In combination, a furnace setting, a travelling grate therein, atrough adapted to contain water, means extending from said setting intothe water space of said trough to seal the grate from access of air, twoparallel conveyors of the endless chain type in said trough beneath thewater level thereof, and means adapted to direct ashes from the gratecontinuously into either conveyor.

3. In combination, a furnace setting, a travelling grate therein, an endwall on said setting, a trough adapted to contain water constructed insaid setting, means depending from said end wall into the water space ofsaid trough to seal the grate from access of air, a longitudinalpartition dividing said trough into two compartments, an ash conveyor ofthe endless chain type disposed in each compartment below the waterlevel thereof, a support between the compartments, a plate mounted toturn on an axis in the support parallel to said partition, and means forpositioning the plate so as to direct ashes from the grate continuouslyinto either compartment.

In testimony whereof I have signed my name to this specification.

E. W. ROBEY

